What is the easiest way to set up an Arduino UNO as a USB Joystick?

I've spent that last week reading up on HID USB joysticks, and I've looked into several different libraties, but I can't seem to get anything to work. I would really appreciate some help on something I would assume is a very easy project.

I created a simple single axis handbrake with a pot, I designed, printed, etc. everything. I just need to interface three wires from the pot into a single axis USB HID and I'm done. It sounds pretty simple to me, but apparently this is rocket science for the layman.

I was able to get the HID joystick working in windows using this great tutorial: http://mheironimus.blogspot.com/2015/11/arduino-joystick-library.html

At the moment I have buttons, but I need to figure out how to add pots. Anyone here have experience with this?